HAVANA -- U.S. swimmers won five of the six final events, giving them 24 of 32 gold medals -- their worst performance in the 40-year history of the games.
Ron Karnaugh of Maplewood, N.J., won the 200 individual medley in 2 minutes, .92 second, second-fastest time in the world this year and a Pan Am Games record. Ray Looze of Belmont, Calif., finished third.
Alex Kostich of Belmont, Mass., successfully defended his 1987 title in the 1,500 freestyle by winning in 15:21.36. He earlier won the 400 individual medley.
Because of a paperwork error by the U.S. Olympic Committee, Sean Killion of Cherry Hill, N.J., had to be scratched from the 1,500. Killion earlier set a games record in winning the 400 freestyle.
Susan Gottlieb of Shelbyville, Ind., and Angie Wester-Krieg of Campbell, Calif., finished 1-2 in the 200 butterfly. Gottlieb's time was 2:12.35. Dede Trimble of Short Hills, N.J., won the 200 backstroke in 2:15.80.
Winning the men's 400 relay in 3:42.84 were Andy Gill of Orlando, Fla., Hans Dersch of Atlanta, Mike Merrell of Charlotte, N.C., and Joel Thomas of Pasadena, Calif.
Kristen Topham of Toronto won the 50 freestyle in 26.01 seconds, a Pan Am Games record.
Cuba won the men's gold with a 15-9, 15-12, 15-8 victory over Brazil. Argentina beat the United States, the defending Pan Am champion, for the bronze medal, 17-15, 6-15, 15-6, 15-10.
In the women's competition, Cuba won the gold medal over Brazil, 8-15, 15-6, 15-9, 15-6. Peru won the bronze with a 15-13, 15-9, 15-2 victory over Canada. It was Peru's third medal of the games, all bronze.
Lourdes Medina of Cuba won three of the four individual gold medals awarded yesterday and helped win the team gold.